Linux Distros Unpatched Vulnerability : CVE-2025-8277

low Nessus Plugin ID 264494

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability. (CVE-2025-8277)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Low

ID: 264494

File Name: unpatched_CVE_2025_8277.nasl

Version: 1.4

Type: local

Agent: unix

Family: Misc.

Published: 9/10/2025

Updated: 10/14/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2025-8277

CVSS v3

Risk Factor: Low

Base Score: 3.1

Temporal Score: 2.9

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libssh-devel, p-cpe:/a:debian:debian_linux:libssh, cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:libssh2-docs, cpe:/o:centos:centos:7, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:libssh2-devel, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:centos:centos:libssh2, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:libssh-config, p-cpe:/a:centos:centos:libssh-config, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:libssh-devel, p-cpe:/a:redhat:enterprise_linux:libssh, p-cpe:/a:canonical:ubuntu_linux:libssh, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:libssh, cpe:/o:canonical:ubuntu_linux:25.04, p-cpe:/a:redhat:enterprise_linux:libssh2, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:libssh2-docs, p-cpe:/a:redhat:enterprise_linux:libssh2-devel, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:debian:debian_linux:12.0

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/9/2025

Reference Information

CVE: CVE-2025-8277

Detections

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